Nut-lock.



W. F. BONNESS.

NUT LOCK.

APPLIUATION FILED 11116.14, 1911.

19399017@ Patented Sept. 17,1912.v Y

[N VEAN T OR WTNESSES O(.

" with and enters into .a citizen of the United diameter and threads of nut and to prevent bent through the FFCE. Y

WILLIAM F. BONNESS, 0F vMADISON, WISCONSIN.

'NUT-LOCK.

` Specication of Letters Yatent. Application led August 14, 1311. Serial No. 643,976. Y

To all whom 'it' may concern:

Be it known'that I, WILLIAM F. BoNNnss, States, residing at Madison, in the county of Dane and State of Wisconsin, have invented cert-ain new and useful Improvements in Nut-Locks, of which the following is a. specification.

My invention relates to nut locks of the type in which a member .distinct from the nut is placed in positive engagement therefrictional engagement with the bolt to prevent relative rotation of the bolt'and nut.

The lock in its preferred form consists of a' folded plate having substantially coaxial threaded openings, one in each leaf, the the openings being those of the nut to be locked. the leaves maintain such relathreads of the two are slightly the same as When free, tion that the out of parallehwhence it follows that inthe act of screwing the lock onto a threaded stem or shank its connecting web or fold is stressed, and the threads are caused to exert a binding friction upon those of the stem. One leaf is provided with a lug or equivalent, (one or more) to engage the main rotation thereof except upon application of force suliicient also to overcome the friction of the lock.

The preferred embodiment of the device is illustrated in the accompanying drawings in which :'-f V Figure 1 is a plan view of the blank from which the nut is made; Fig. 2 is a side elevation of a completed nut; Fig. 3 is a perspective view of the same; Fig. 4 is a view partly sectional showing the lock applied to a grease cup; and Fig. 5 is an elevation showing it applied to a turnbuckle.

The blank is preferably a stamping consisting of two ring portions 1, connected by a web or strip 2,:one ofthe ring portions having one or more lugs 3. rlhe blank is web 2 until the ring portions 1 are substantially parallel and lslightly spaced apart as in Fig. 2. The lugs 3 are bent down-'at right angles to the plane of. the ring 1 on which they are formed. .The bore of the nut is then tapped while the two ring portions aresprung from their normal relative positions, or else the two ringportions are bent toward or from each other after the tapping is completed, so that in either case the threads in the two portions are slightly outl of register, and the action on nuts to turn with' forth above without hencel exert a resilient clamping the threads of the bolt to which it is applied.

ln use the lock nut is laid upon any ordinary nut so that the lugs 3 engage the iats of the nut and the `two are then turned onto the bolt. The engagement of lthe lugs 3 on the lock nut with the flats of the ordinary nut compels the two to turn together so that the'frictional engagement of the lock nut with the bolt prevents the other nut from backing off.

-In Fig. 4 the device is. shown applied to a grease cup 4 having 1.a threaded plug 5.

nut may Here the lugs .3 engage flats 6 on the cup 4 and prevent the lock nut from turning on the cup. The clamping action of the lock nut on the plug prevents the latter from backing out andyet is not so great as to prevent its being turned by a wrench.

ln Fig 5 the device is shown applied to a turnbuckle having a nut or sleeve 7 threaded on rods 8. In this case the lugs 3 engage flats 9 on the sleeve 7 so as tc cause the lock the sleeve and by their frictional engagement with' the rods 8 to prevent undesired turning of the nut or Sleeve.

Obviously the locknut is applicable to a large variety of threaded members, and requires merely the formation of fiat portions or recesses on the nut to hold the lugs 3. lt requires noadjustment and is tur-ned as the nut is turned Jso that it requires no special manipulation.

Obviously changes may be made from the exact form and mode of manufact-ure set departing from the spirit of my invention.

t will be noted that in operation the lock is attached to the nut and exerts a frictional action upon the bolt, and it is immaterial whether the nut be held stationary and the bolt turned therein, as in the case of the grease-cup,

the case of the turn buckle or ordinary bolt and nut.

Having thus described. the 1nvention,what

l claim is 1. A nut lock, consisting of a folded plate, v

and threads of Patented Sept. i7, i912.

the openings corresponding' l0() or whether the bolt be held stay tionary and the nutturned thereon, as in Y the threads of t e with those of such nut, andsaid leaves when maintaini'n such relation as to hold 1 twofslightly out of pare 2. A nut lock comprising `two substantially parallel leaves connectedby a resilient web, said leaves having substantially coaxial threaded openings of diameter and pitch correspondin toJv those of the nut to be locked, said yiel ing'v web tending to hold the threads of the two leaves out of normal relation, and one of said leaves being provided with a lug to engage such nut.

3. A nut lock consisting of two substantially parallel leaves connected by a resilient Web or fold, said leaves having threads nor-4 Amallyl displaced slightly from true relative pitch, whereby, when the lock is screwed upon a stem the connecting web will be' stressed and the threads of the lock will be 2o caused to exert` an elastic frictionup'onjhose of the stem, said lock being provided wlth means for engaging the nut to be locked, whereby independent rotation is prevented.

In testimony. whereof I have signed my 25 name to this specification in the ,presence of two subscribing witnesses.

WILLIAM F. BONNESS. Witnesses:

CHAs. ONEILL, Cms. W. Jorma.` 

